John Garner
Titanium
- Joined
- Sep 1, 2004
- Location
- south SF Bay area, California
Good Afternoon, All --
I'm looking at some shaped shim blanks machined from stainless laminated shim stock (MIL-S-22499) which are a PITA to make because the material tends to delaminate under cutting forces. Wire EDM strikes me as a much better way of making these parts, but the "local expert" says that the laminated stock can't be EDM'd.
An ohmeter check shows that the material is conductive, but the resistance through the 1/8 inch thickness (perpendicular to the plane of the laminations) is between 2 and 3 ohms, which is greater than the fractional-ohm resistance within the foil sheets.
So what's your thought . . . is wire EDMing a workable way of cutting shapes out of this type of laminated stock or not?
Thanks in advance for your replies.
John
I'm looking at some shaped shim blanks machined from stainless laminated shim stock (MIL-S-22499) which are a PITA to make because the material tends to delaminate under cutting forces. Wire EDM strikes me as a much better way of making these parts, but the "local expert" says that the laminated stock can't be EDM'd.
An ohmeter check shows that the material is conductive, but the resistance through the 1/8 inch thickness (perpendicular to the plane of the laminations) is between 2 and 3 ohms, which is greater than the fractional-ohm resistance within the foil sheets.
So what's your thought . . . is wire EDMing a workable way of cutting shapes out of this type of laminated stock or not?
Thanks in advance for your replies.
John